According to police in Brookfield, Connecticut, two teenagers have been arrested after causing a rear-end collision in which personal injuries were sustained by playing a prank involving an imaginary game of tug-of war.

According to police, the “invisible rope game” involves two people standing on opposite sides of a street. When a vehicle approaches, the pair enters a tug-of-war stance, pretending that they are holding a rope taut across the path of the oncoming car. The vehicles then slow down and the pranksters run off.

However, according to police, recently the vehicle of a resident of Brookfield stopped short in order to avoid the pretend rope, causing the person’s car to be rear-ended by another, resulting in two people requiring transport to the emergency room.